J
Cable straight-through joint
A joint connecting two lengths of the same cable in line, drawn as a mark on the cable route.
IEC
IEC · J
Cable transition joint
A joint connecting two different cable types, such as paper-insulated to polymeric or land cable to submarine cable.
In plain English
What does Cable transition joint mean?
A transition joint joins cables of different construction, for example a legacy paper-insulated lead-sheathed cable to a modern XLPE cable, or a submarine cable to a land cable at a landfall. The drawing distinguishes it from an ordinary joint because the two sides have different ratings, impedances and maintenance requirements.
A simple example
The symbol does not tell you the rating of each side. The circuit rating is set by the weaker section, so readers should check the cable data on both sides of the transition. Screen and sheath bonding at transitions often changes arrangement and should be read from the bonding diagram.
What the drawings help you do
Compare cable types and ratings on both sides of the transition. Check bonding changes at the transition. A transition joint joins dissimilar cables; a straight-through joint joins two lengths of the same type.
This particular reference
A joint connecting two different cable types, such as paper-insulated to polymeric or land cable to submarine cable. A transition joint joins dissimilar cables; a straight-through joint joins two lengths of the same type.
- Rating
- A value stating the conditions for which equipment is specified.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: Elastimold underground cable accessories · IEC-60617 symbol preview directory
IEC · Transition cable joint
Independent IEC-context illustration; not certified IEC geometry.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
SLD / GA · J
What it represents
A transition joint joins cables of different construction, for example a legacy paper-insulated lead-sheathed cable to a modern XLPE cable, or a submarine cable to a land cable at a landfall. The drawing distinguishes it from an ordinary joint because the two sides have different ratings, impedances and maintenance requirements.
The symbol does not tell you the rating of each side. The circuit rating is set by the weaker section, so readers should check the cable data on both sides of the transition. Screen and sheath bonding at transitions often changes arrangement and should be read from the bonding diagram.
How to read it
- Compare cable types and ratings on both sides of the transition.
- Check bonding changes at the transition.
Information to show or reference
- Identify both cable types at the joint.
- Rate the circuit on the weaker section.
- Show screen and sheath bonding at the transition.
A distinction that matters
A transition joint joins dissimilar cables; a straight-through joint joins two lengths of the same type.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Elastimold underground cable accessories
Manufacturer context for underground cable joints and transitions.
IEC-60617 symbol preview directory
Public directory of IEC-oriented symbol families.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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